Files with supp extension seems to be found on certain iOS devices, perhaps data files related to iPhone Jail Break.
Software that open supp file
SUPP file extension - iOS data file
What is supp file? How to open supp files?
File type specification:
File extension supp is associated with the Apple iOS a Unix-based operating system for iPhone, iPad, iPod Touch and Apple TV devices.
It appears that .supp file stores some kind of data related to Apple iOS application (.ipa) files. Possibly related to JailBro
The default software associated to open supp file:
Company or developer:
Apple, Inc.
Apple iOS is the latest version of iOS operating system for Apple mobile platform devices such as Apple iPhone, iPad and iPod Touch. iOS is based on XNU hybrid kernel from Mac OS X (macOS).
iOS contains multi-touch interface (also known as SpringBoard GUI), and various default apps, such as Phone, Mail, Safari, Music, Videos, Messages, Photos, Camera, FaceTime, Maps, Weather, Notes, etc. Other apps are available in App Store.
List of recommended software applications associated to the .supp file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open supp file, edit supp file, convert supp file, view supp file, play supp file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with supp file - iOS data file
Click on the software link for more information about Apple iOS. Apple iOS uses supp file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
